Every year, at 8:30 pm on the last Saturday of March, millions of people across the world join in raising awareness of the issues facing our planet.
Started by the World Wildlife Fund (WWF) and partners as a symbolic lights-out event in Sydney in 2007, Earth Hour is now one of the world's largest grassroots movements for the environment.
Each year, Earth Hour engages millions of people in more than 180 countries and territories, switching off their lights to show support for our planet.
But Earth Hour goes far beyond the symbolic action of switching off - it has become a catalyst for positive environmental impact, driving major legislative changes by harnessing the power of the people and collective action.
Earth Hour is open-source and everyone, anyone, is welcome to take part and help amplify our mission to unite people to protect our planet.
(from: https://www.thereisadayforthat.com/holidays/various/earth-hour )
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